Groceteria.com

Found this over on the Internet Archive
has A lot of information pertaining to Safeway during that era
it's available as a PDF as well

https://archive.org/details/TheNewWayAtSafeway1958

The most interesting thing is the listing of their private brands, many of which were likely scuttled as early as the 1970s. There's "Zippy" pickles, Van Zee cheese, "Scamper" detergent, and Cragmont sodas.